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Thermoroche MW EWI System - EWI System

Verified by manufacturer 3 days ago

PRB Systems Ltd Product certifications:
  • European Technical Assessment (ETA)

    European Technical Assessment (ETA)

    Certificate type

  • European Technical Approval (ETA)

    European Technical Approval (ETA)

    Certificate type

A fire-rated EWI render system.

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+44 (0) 1242 524 228 Website

Application

Suitable for new build or refurbishments including non-traditional housing stock.

Description

The PRB Thermoroche EWI render system is an adhesively bonded, externally insulated, mineral wool, rendered facade system with supplementary mechanical fixings, available with a range of rendered and paint finishes for use on masonry and framed buildings up to and exceeding 11 metres in height (dependent upon location, structure type and finishes specified).

Features and benefits:

  • A BBA and ETA-certified system for use without height restriction, protecting the external walls from weathering with a minimum 30-year life expectancy.
  • The mineral wool system provides fire protection.
  • The mineral wool insulation system can improve sound insulation.
  • Different wall constructions can be accommodated including brick, stone, concrete and lightweight blockwork, concrete panels, cast concrete, render boards, non-traditional substrates comprising of reinforced concrete (cast in-situ), prefabricated reinforced concrete (PRC) and large panel systems (LPS), steel framed and steel clad structures and timber framed buildings.

General information

Color

Other

Material

Mineral wool

Aluminium

Render

Shape

Other

Length

Bespoke

Width

Bespoke

Height

Bespoke

Uniclass

Ss_25_45_72_28 External wall insulation systemsPrimary

CAWS

M21/210 Rendered external wall insulation systems

M21/20 External wall insulation systems

Specification data - External wall insulation systems

Classification data

System performance

Fire performance to EN 13501-1, Class A2-s1, d0.

Guidance for specification option:

Project specific requirements must be taken into account.

Support rails and brackets

-

Fixing method

-

Material

Aluminium support rails, mill finish.

Guidance for specification option:

Insert gauge requirements.

Aluminium support rails, powder-coated.

Guidance for specification option:

Insert gauge requirements.

Stainless steel support rails.

Manufacturer guidance

Aluminium profiles: Standard gauge 0.8 mm and premium gauge 1.0 mm up to 120 mm wide and robust gauge 1.2 mm from 130 mm upwards. The base profile width will be determined by the insulation thickness.

Stainless steel profiles: Standard gauge 0.7 mm. The base profile width will be determined by the insulation thickness.

Bracket fixings

Rawlplug FX N L 6 x 40 mm, Ejot NK U.

Guidance for specification option:

Hammer in fixings for concrete, solid or perforated masonry.

Ejotherm NK U.

Guidance for specification option:

Hammer in fixings for concrete, solid or perforated masonry.

Ejot SDK U.

Guidance for specification option:

Screw in fixing for concrete, solid or perforated masonry.

Insulation

-

Material

Mineral wool slab insulation

Guidance for specification option:

  • Non-combustible mineral wool to EN 13162 (dual or single density) in 1200 x 600 mm square-edged panels. Thickness ranges from 40–200 mm in 10 mm increments. For other thicknesses double up the insulation as necessary to complete the detailed design of the system.
  • Thermal conductivity: 0.036 W/mK.
  • Dual density: 140/ 115 kg/m³.
  • Minimum compressive strength: 20 kN/m² at 10% compression.

Adhesive

PRB Fondisol F.

Guidance for specification option:

Applied as a full serrated bed or five large dabs and perimeter edge.

Additional mechanical fixings

PRB approved insulation fixings.

Fire barriers and stops

-

Material

-

Manufacturer guidance

Insert requirements or omit.

Fixings

-

Manufacturer guidance

Insert requirements or omit.

Beads and trims

UPVC corner beads with glass fibre mesh wings.
UPVC stop beads with glass fibre mesh wings.
UPVC drip beads with glass fibre mesh wings.
UPVC balcony or window door head beads with glass fibre mesh wings.
Stainless corner beads.
Stainless stop bead - no nosing.
Stainless stop bead - with nosing.
Stainless drip bead.
Stainless balcony or window door head beads.

Manufacturer guidance

UPVC bead options: 4, 6, 10, 12, 15 mm (subject to render system finish) x 2.5 m and 3.0 m.

Stainless steel bead options: 6, 10, 12, 15 mm (subject to render system finish) x 3.0 m.

Movement joints

-

Form with

Full system horizontal movement profile.
In line vertical expansion joint profile with soft PVC centre section, with glass fibre mesh.
Corner vertical expansion joint profile with soft PVC centre section, with glass fibre mesh.
Reveal compression profile with integrated sealing tape and glass fibre mesh.
UPVC movement/ expansion beads with glass fibre mesh wings.
Stainless movement/ expansion beads.

Sealant

-

Manufacturer guidance

Insert requirements or omit.

Accessories

-

Manufacturer guidance

Insert requirements or omit.

Render carrier or reinforcement

-

Material

Single layer standard mesh - PRB AVN Mesh.

Guidance for specification option:

Impact resistance (ETAG 004) - Category II - Standard application.

Double layer standard mesh - PRB AVN Mesh.

Guidance for specification option:

Impact resistance (ETAG 004) - Category I - High impact locations.

Single layer heavy duty mesh - PRB AVR Mesh + single layer standard mesh PRB AVN Mesh.

Guidance for specification option:

Impact resistance (ETAG 004) - Category I - High impact locations.

Manufacturer guidance

Mesh embedded into the PRB Fondisol F basecoat when wet.

Render

-

Application

Base coat.

Material

PRB Fondisol F.

Decorative finish

PRB Thermolook.

Guidance for specification option:

  • At 10 mm after a scraped finish (applied 13 mm) or 8 mm to receive a roughcast/ textured finish. Not recommended as a float finish.

PRB Thermolook and Topcoat mesh.

Guidance for specification option:

  • At 10 mm after a scraped finish (applied 13 mm) or 8 mm to receive a roughcast/ textured finish. Not recommended as a float finish.
  • Topcoat mesh (recommended when additional robustness is required): PRB Orange Mesh or PRB AVE Mesh. Insert requirements.

PRB Crepifond F/ G and PRB Crepoxane F/ M.

Guidance for specification option:

  • PRB Crepifond F or G: Acrylic resin, high opacity primer.
  • PRB Crepoxane F or M: Siloxane resin, hydrophobic, 1.0 mm or 1.5 mm thin coat render. Floated or sprayed finishes, applied over a coloured primer suction control coat of PRB Crepifond F or G.

Crepisix M.

Guidance for specification option:

  • Acrylic resin, siloxane resin enhanced, 1.5 mm thin coat render.

Crepifond Mineral G and Crepixate M.

Guidance for specification option:

Potassium silicate finish suitable for when the EWI system requires additional breathability.

  • Crepifond Mineral G: Mineral, potassium silicate high opacity primer.
  • Crepixate M: Potassium silicate mineral based 1.5 mm thin coat render. Floated or sprayed finishes, applied over a coloured primer suction control coat of PRB Crepifond Mineral.

Colour

-

Manufacturer guidance

Consult manufacturer and insert requirements.

Protective coating

PRB Color Acrylflex.
PRB Color Siloflex.
PRB Color Mineral Plus.

Manufacturer guidance

Colour options: Available as a tint to order with over 100 PRB colours and multiple RAL colours as an option.

System accessories

Not required.
Spiral anchor.

Guidance for specification option:

Suitable for fixing lightweight components including house numbers and lights.

Ejot Iso-Dart.

Guidance for specification option:

A fastening system for the retrofitting of light to medium heavy weight components, such as downpipe brackets and signs.

Ejot® Power-Bloc.

Guidance for specification option:

Suitable as backings for thermal bridge-free, pre-determined fixing locations in EWI systems of expanded polystyrene (EPS) and stone wool (SW). May also be used as pressure pads for medium-heavy loads.

Sustainability data

Material

Mineral wool
Aluminium
Render

Expected Life

30 year

Product certifications

European Technical Assessment (ETA)

European Technical Assessment (ETA)

PRB Thermoroche Mineral Wool ETA

European Technical Approval (ETA)

European Technical Approval (ETA)

PRB EWI System ETA

Literature

Thermoroche system - Feb 2025

Thermoroche system - Feb 2025

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